Machine for making carboys or large glass containers



y H. M. BROWN. MACHINE FOR MAKING AHBOYS 0R LARGE GLASS CONTAINERS. APPLICATION FILED DEC.2| 191'8.

1 ,334,647. Patenfed Mai'. 23, 1920.

2 SHEETS-SHEET l.

1 j ATTUHNEIS H. M. BRow-N. MACHINE FOR MAKING CARBOYS 0R LARGE GLASS CONTAINERS.

APPLICATION FILED DEC.2, 1918.

1,334,647. Patented Mar. 23, 1920. 4 2 SHEETS-SHEET 2. 20 2 S2 :if II 55%;

A TTUHNEYS with internally threaded mouth portions UNITED sTATEs PATENT oEEIoE.

HARRY M. BROWN, OF BROOKLYN, NEW YORK, ASSIGNOR TO SPRING STOPPER COMPANY, OF BROOKLYN, NEW YORK, A CORPORATION OF DELAWARE.

MACHINE FOR MAKING CARBOYS OR LARGE GLASS CONTAINERS.

Specification of Letters Patent. Patented Mar, 23, 1920.

Application filed December 2, 1918. Serial No. 265,040.

To nZZ whom it may concern:

Be it known that I, HARRY M. BROWN, a citizen of the United States, residing at Brooklyn, in the county of 'Kings and State of New York, have invented a new and useful Improvement in Machines for Making Carboys or Large Glass Containers, of which the following is a specification.

This' invention relates particularly to a machine adapted to use in the manufacture of cai-boys, or other large glass containers; and theprimary object is to provide a machine which is simple in construction, easy of operation, and of 'large output capacity, adapted for the commercial production of carboys, or other large containers, provided adapted to receive threaded Stoppers.

A further object is to provide an exceedingly simple machine of the character indicated, which is labor-saving in operation.

The invention is illustrated, in a preferred simple embodiment, in the accompanying drawings, in which- Figure l represents a broken vertical sectional view of the improved machine or press, the dotted lines indicating the bodily shifted position of the plunger and its actuating mechanism; Fig. 2, a horizontal sectional view taken approximately as indicated at line 2 of Fig. 1; Fig. 3, a broken rear elevational view; Fig. 4, a sectional view taken as indicated at line 4 of Fig. l; Fig. 5, a vertical sectional View of the valve device controlling the operation of the plunger for forcing the molten metal into the neck-mold, the section being taken as indicated at line 5 of Fig. 6; and Fig. 6, a horizontal sectional view taken as indicated at line 6 of Fig. 5.

' 1n the embodiment illustrated, A represents the bed, or base-plate, of the machine, mounted on legs A1; B, a three-part neckmold mounted on the bed A; C, an arbor having one end projecting into the mold B and equipped with a thread adapted to form an interior thread in the bottle-mouth and having a shaft equipped witha thread of corresponding pitch which engages the threaded bore of a fixed hearing; and D, mechanism for forcing molten metal into the mold B. said mechanism being mounted on a carriage D1, which is shiftable on the bed-plate A by means of mechanism D2. The carriage D1 has its uprights equipped with elongated mold-locking cams D3 (one shown in full lines and one in dotted lines, in Fig. 2), which serve to lock the closed mold. both when the mechanism D is in the full-line and the dotted line position 'shown in Fig. l. Vhen, however, the carriage D1 is wholly retracted,v the mold can be opened to permit removal of the carboy.

The frame of the machine may be of any suitable construction. Preferably it comprises the bed-plate A supported as shown; and theconstiuction of the machine is such as to permit a carboy E to be disposed horizontally in front of the machine, with the neck of the carboy projecting into the mold B.

The carboy is usually blown in an iron mold, in which it is formed with a neck-portion l, which requires to be reinforced and provided with an internal thread, which operation is performed in the machine herein described. Vhile the carboy, or the neckportion thereof, is hot, it is entered in the mold B; and "aloall of hot or molten glass is introduced and pressed into the mold, the mandrel being in the position shown in Fig. 1. VIn this operation, the head and moutliportion of the carboy is formed and becomes practically integral with the neck of the carboy, and the mouth-portionis provided with an internal thread. The mandrel is then unscrewed and withdrawn and the carriage D1 wholly retracted, which enables the mold to be opened, thus permitting the carboy to be lifted out of the mold. The carboy is then placed in an annealing furnace, where it remains until properly tempered.

The mold B comprises a lower half-section 2, which is firmly secured upon the bed-plate A by any suitable means (not shown), and a pair of upper quarter-sections 3 equipped with arms 3a which are connected by horizontal pivots 4 with pivotlugs 5, which project laterally from the lower mold-section 2. The upper mold-sections 3 are provided with upward extensions 3b. which together form a tubular upper ex.- tension ofthe mold and afford a -cavity G adapted to hold the charge of molten metal, or plastic glass, which is to be pressed into the mold, to form the carboy-head. The

semi-cylindrical upward extensions 3" have n lower end of fthe plunger 7 Assuming the\ their outer sides equipped with lock-engaginglugs 3, adapted to be engaged by the mold-locking cams D,

The neck-mold B is adapted to be opened and closed by means of avertical plunger 7, working through the bed-plate A and Y equipped at its upper end with a cross-head 7; a pair of links 7b connecting said crosshead with the arms 3n of the uarter-sections 3 of the mold; and a footever 7c whose inner end is connected by a link 7d to the mold to be unlocked, depression of the outer end of the footdever 7c will elevate the plunger 7 and throw the quarter-sections 3 of the mold to the open position. Reverse movement of the foot-lever, as by means of plunger may be depended upon to close the a weight 7e, will close the mold; or thel weight of the mold-sections 3 and the mold, when the pressure upon thefoot-lever is removed.

The mandrel C is carried by standards 8 and 9 mounted on the bed-plate A, the formerhaving a bearing 8a in which the mandrel shaft will turn and slide freely, and the latter having a bearing, the bore of which is rovided with a thread 9a, which receives a t read 10, with which the mandrel-shaft is provided at its rear end. The mandrel is provided with a tip-end- 11 equipped at its base-portion with a thread 11a of the same pitch as the thread 10. The tip-portion ofthe mandrel is shown formed integrally with a collar 11b, which is secured to the mandrel-shaft by means of a pin 12. It will thus be understood that the tip-portion of the mandrel is virtually integral with the mandrel shaft, and that the mandrel has the rounded inner end-portion 11c which projects some distance beyond the thread 11a, thus forming an arbor which enters the neck-portion of the bottle beyond the mouth-portion Which receives the thread. l

The rear end of the mandrel-shaft is equipped with a hand-wheel 13, by means of which the shaft may be turned to project or retract the mandrel. This handwheel is provided at its periphery with a stud 13a which engages a stop 14 carried by the bed-plate, thus limiting the movement of the mandrel when it is projected into the mold. The same stud 13a is adapted to engage a stop 15 in the form of a bar secured to the 4bed-plate A, when the mandrel has turned backward a suicient distance to disengage the thread l0 thereof from the threaded bearing 9a. The mandrel may then be withdrawn or pulled back to cause the mandrel tip 11,c to clear the mouth of the carboy. Secured to the base A is another and shorter bar 15a which is spaced a short distance from the bar 15 and affords a slot or ide 15b in which the stud 13Pmay move w en the mandrel is drawn rearwardl after it has been unscrewed from the earing 9". y

The collar portion 11b of the mandrel occupies, when themandrel is in the osition shown in Fig. 1, an opening in tie rear side of the mold, which is formed by complemental recesses, with which the moldsections are provided. The mold-sections are provided at their front sides with complemental recesses of suitable contour to conform to the neck-portions of the bottle, vhere they rest in the mold. The bottom of the cavity 6 tapers to a small discharge opening 6, through which the hot plastic glass is forced into the mold-cavity 16.

The mechanism D for forcing the molten metal into the mold comprises a plunger 17 on the lower end of a piston rod 17, whose upper end is equipped with a piston 17; a pressure cylinder 18 adapted to receive air or other fluid under pressure, for actuating the piston 17b in both directions; a pressure pipe 20 adapted to deliver fluid under pressure to the cylinder; and a valve 2l controlling admission to and exhaust from the cylinder. 'Ihe valve 21 comprises a casing 21a and a plug 21b therein, the plug 2lb having admission and exhaust ports therethrough and being` equipped with an actuating handle 21. The cylinder 18 is provided with ports 18, which serve alternately as admission and exhaust ports, for admitting pressure to either end of the cylinder and exhaust from the other end. The plug valve 21b is provided with an admission por't 22, which can be placed in communication with either one of the ports 18a, and exhaust ports 23 which are adapted to discharge through a common longitudinal port 23%, with which the plug-valve 21b is provided.

The carriage D1, which is movable forwardly and rearwardly, that is longitudinally with respect to the mandrel C, comprises a pair of slides 24 mounted on horizontal guide-bars 25 ixedly secured to supporting brackets 2G rigidly mounted on the bed-plate A; standards 27 fitted in the tubular sockets 21rL which are formed integrally with the tubular slides. 24; and fittings 28 iixedly secured on the upper ends of the standards 27 and serving to support the cylinder 18, which is firmly connected to the fittings 28, as by means of screws, ol bolts, 29. It thus appears that the carriage may be shifted rearwardly. to carry the cylinder 18 to the dotted position shown in Fig. 1, thus bodily shifting the mecha-- nism D so as to uncover the mold B. The locking` cams D3 comprise arms carried by split clamping-rings 19 which are secured on the uprights 27 just above the fittings 24, The cams D3 are adapted to make sliding contact with the lock-lugs 8 of the upper mold-sections.

The mechanism D2 for shifting the carria e D1 preferably comprises a transverse roc shaft 30 journaled in brackets 31 secured to the rear end of the bed-plate A and equipped with a hand-lever32 which., when the mechanism Dl is in operative position, inclines forwardly somewhat, as shown by the full lines in Fig. 1; a pair of short arms 3.3 rigidly secured to the rock-shaft; and a pair of links 34: connecting the arms 33 with the tubular slides 24. The hand-lever 32 is c disposed at one side of the machine within convenient reach of an operator standin in position to actuate the foot-lever 7. he air-controlling lever 21c is also located within convenient reach of the operator.

The operation may be stated briefly. Assuming the mold to have been opened to permit removal of the carboy, the operator removes the pressure upon the foot-lever 7 C, thus permitting the mold to close; he then projects the mandrel into the mold by movling it forwardly and turning it righthandedly, thus causing the screw 10 to engage and turn in the threaded bearing 9, and he then, through the medium of the hand-lever 3Q, shifts the pressure mechanism D forwardly from the completely retracted position to the position shown by dotted lines in Fig. '1, in which position the forward extremities of the mold-locking cams D3 engage the lugs 3C of the upper mold-sections. Thus, the mold is locked in closed position while the cylinder 18 occupies the dotted position shown in Fig. 1, so that metal may be introduced into the mold. Before thisis done, however, an assistant, standing in front of the machine, forces the neck-portion of the carboy into the mold. This is done While the carboy and particularly the neck-portion thereof is hot, so that the neck ofthe carboy will conform to the front oriiice of the mold into which it is introduced; and inasmuch as the mold is locked at this time, it cannot be opened by the action of introducingthe carboy-neck. The operator then introduces into the feed-chamber 6 of the mold the requisite quantity of molten metal (glass), and then shifts the pressure mechanism D forwardly to the full line position shown in Fig. 1. He then turns the plug-valve 21", through the medium of the handle 21, to a position to admit air pressure to the upper portion of the cylinder 18, thereby causing the piston to descend, thus forcingthe molten glass through the orifice Ga into the chamber 16 of the mold. This molds the plastic material about the mandrel and causes it. to become welded or united to the neck-portion of the carboy, the mouth of the carboy being formed in this operation and provided with an internal thread. The mandrel C is then unscrewed from the bearing 9a, the screw 11 at the operative end of the mandred being at, the same time unscrewed from the internal thread in the mouth ofthe carboy. When the screw 10 becomes'dlsengaged from the threaded bearing 9a, the mandrel is slid rearwardly longitudinally, the slot 13a moving in the groove 15". Thus by this action, the mandrel is y"withdrawn so that the rounded tip-portion 11c will clear the mouth of the carboy. The operator at this instant, or earlier, if desired, turns the plug 21b so as to cause the withdrawal of the plunger 17; and at the appropriate instant, the mechanism D is shifted rearwardly to the completely retracted position by means of the lever 32, and the mold is thrown open by means of the footlever 7, thus leaving Vthe carboy free to be lifted and withdrawn from the mold.

If desired, a suitable rest (not shown) may be arranged in front of the machine upon which the carboy may be rested by the rattendant while the machine is being operated.

The improved machine is of simple construction, facile in operation, and capable of a comparatively large output of large containers, while requiring the services only of an operator and an assistant.

The foregoing detailed description has been given for clearness of understanding only, and no unnecessary limitation should be understood therefrom, but the appended claims should be construed as broadly as permissible, in view of the prior art.

What 1 regard as new, and desire to secure by Letters Patent, is:

1. 1n a machine for the purpose set forth, the combination of a base, a half-mold section mounted thereon, a pair of quarter mold sections surmounting said half moldsection and adapted to turn about horizontal pivots, said quarter-mold sections being equipped with upward extensions affording a charge-receiving cavity, a plunger adapted to force the charge from the charge-receiving` cavity into the mold cavity, a mandrel having a tip-portion adapted to extend into the neck of the container. and having at the base portion of the mandrel thread-formingmeans adapted to form internal threads in the mouth of the container, said tip-portion and thread-forming means being disposed in the 1noldcavity and shiftable as a unit, and means for retracting andprojecting the mandrel.

2. In a machiife for the purpose set forth, the combination of a mold comprising longitudinally separable sections adapted to receive between them the neck of a container, said mold being provided at one side of the mold-cavity with a charge-receiving` cavity, a mandrel adapted to form an internal thread in the mouth of the container,

isc

said mandrel having a tip-portion adapted to extend into the neck ofthe container and at the base thereof thread-forming means,

'shiftably-mounted pressuremechanism provided with a plunger adapted to force the molten metal from the charge-receiving cavit into the mold-cavity.

3. n a machine for the purpose set forth, the combination of a mold comprising longitlldinallyl separable sections adapted to receive between them the neck of a container, said mold being provided at the upper side of the mold-cavity with a charge-receiving cavity, a mandrel adapted to produce an internal thread in the mouth of said container, said mandrel having a tip-portion equipped with an external thread located in the moldcavity and having a shaft equipped with a thread of corresponding pitch engaoing a threaded stationary bearing, means or rotating said mandrel, guides extending substantlally parallel wit the mandrel, a forwardly and rearwardly shiftable carriage mounted on said guides and equipped above the plane of the mandrel with a pressure cylinder, a piston working in said cylinder and equipped with a plunger adapted to force the metal from the charge-receiving cavity into the mold-cavity, and means for shifting said carriage.

4. In a machine for the purpose set forth, the combination of a mold comprisin longitudinally separable sections adapter? to receive between them the neck of a container, said mold being provided at the upper side of the mold-cavity with a charge-receiving cavity, a mandrel adapted to produce an internal thread in the mouth of said container, said mandrel having a tip-portion equipped with an external thread located in the moldeavity and having a shaft equipped with a thread of corresponding pitch engaging a threaded stationary bearing, means for rotating said mandrel', guides extending substantially parallel with the mandrel, a forwardly and rearwardly shiftable carriage mounted on said guides and equipped above the plane of the mandrel with a pressure cylinder, a piston working in said cylinder and equipped with a plunger adapted to force the metal from the charge-receiving cavity into the mold-cavity, a transverse rock-shaft journaled at the rea-r portion of the machine and equippedwith arms and' links joining said arms to said carriage, and a hand-lever `serving to actuate said rockshaft.

5. In a machine of the character se't forth, the combination of a bed-plate, a ixed lower mold-section mounted thereon, a pair of complemental upper mold-sections provided a footever accessible at one side with complemental upward extensions affording a charge-receivin cavity, said upper sections being mounte to swing on horizontal pivots, a plunger working through the bed-plate, links connecting the upper end of the plunger with the upper mold-sections, a foot-lever accessible at one side of the machine and serving to actuate said plunger, a mandrel disposed above the bedplate and having an operative end equipped within the mold-cavity with an external thread, said mandrel being equipped back of the mold with another thread of the same pitch, a fixed bearing .having an internal thread engaging said second-named thread of said mandrel, means connected with the rear end of the mandrel for effecting rotation thereof, and means for forcing a -charge into the mold-cavity.

' 6. In a machine of the character set forth, the combination of a bed-plate, a fixed lower mold-section mountedA thereon, a pair of complemental upper mold-sections provided with complemental upward extensions affording a charge-receiving cavity, said upper sections being mounted to swlng on horizontal pivots, a plunger working through the bed-plate, links connecting the upper end of the lunger with the upper mold-sections,

of the machine and serving to actuate said plunger, a mandrel disposed above the bed-plate .and having an operative end equipped within the mold-cavity with an external thread, said mandrel being equipped back of the mold with another thread of the same itch, a fixed bearing having an internal tliread engaging said second-named thread of said mandrel, means connected with the'rear end of the mandrel for effecting rotation thereof, bodily shiftable ressure mechanism disposed above the mo d and adapted to force a charge into the mold-cavity, and means for shifting said last-named mechanism, including a hand-lever accessible to an operator standing in position'to actuate said foot-lever.

7. In a machine of the character set forth, the combination of a bed-plate, a fixed lower mold-section mounted thereon and a pair of complemental upper mold sections equipped at the outer sides of their lower portions with arms, pivotal supports for said arms, said upper mold-sections being provided with complemental upward extensions affording a charge-receiving cavity,

a plunger working through the bed-plate, links connecting the upper end of said plunger with said arms, a lever adapted to actuate said plunger, a mandrel disposed above said bed-plate and having an operative end equipped within the mold-cavity with a thread, said mandrel being equipped back of the mold with another thread of the same pitch, a fixed bearing carried by the bedplate and ha `"ing an internal thread engaging the eccomi-named thread of the inandrel, means for rotating said mandrel, and means for forcing a charge into the moldcavity.

e. ln a machine of the character set forth, the combination of a bed-plate, a fixed lower mold-section mounted thereon and a pair of complemental upper mold-sections provided with complementa] upward extensions affording a charge-receiving cavity, said upward extensions being mounted to swing on horizontal pivots located at opposite sides of the lower portions of the upper mold-sections, whereby the mold-sections tend to close, mechanism adapted to swing the upper moldsections apart, said mechanism including a manually-actuated lever, a mandrel. disposed above the bed-plate and having an operative end-portion equipped with a thread located in the incid-cavity and having a shaft equipped with a thread of corresponding pitch engaging a threaded stationary bearingcarried by the bed-plate, means for r0- tating said mandrel, and means for forcing a charge from the charge-receiving cavity into the mold-cavity.

9. In a machine for the purpose set forth, the combination of a mold comprising separable longitudinal sections adapted to receive between them the neck of a container, said mold being provided at one side of the mold-cavity with a charge-receiving cavity, means for forcing the charge from said charge-receiving cavity into the mold-cavity, and a mandrel having an operative portion equipped with a thread located in the moldcavity and a tip proj ectingbeyond said thread into the mold-cavity and said mandrel having a shaft equipped with a thread of correspending pitch engaging a threaded stationary bearing, and means for rotating said mandrel, the thread of said shaft beingdisengageable from the threaded stationary bearing to permit sliding movement to enable the tip-portion of the mandrel to be withdrawn from the container after the unscrewing operation has occurred.

10. In a machine of the character set forth, the combination of a bed-plate, a fixed lower mold-section mounted thereon and a pair of complemental upper mold-sections provided vvith complemental upward eXtensions aifording a charge-receiving cavity, said upper sections being mounted to swing on horizontal pivots, mechanism for opening the upper mold-sections, including a i plunger workingthrough the bed-plate and a lever adapted to actuate said plunger, a mandrel disposed above the bed-plate and having an o erative end equipped within the mold-cavity with a thread and a rounded tip beyond said thread,"l said mandrel having a shaft equipped with a thread of corresponding pitch engaging a threaded stationary bearing carried by said bedplate, means for rotating said mandrel and effecting withdrawal of the mandrel to cause the tip-portion to clear the mouth of the container, and means for forcing a charge from the charge-receiving cavity into the mold-cavity.

ll. In a machine of the character set forth, the combination of a bed-plate, a fixed lower mold-section mounted thereon and a pair of coinplemental upper mold sections provided with complemental upward extensions affording a charge-receiving cavity, said upper sections being mounted to swing on horizontal pivots, mechanism for opening the upper mold-sections, including a plunger Working through the bedplate and a lever adapted to actuate said plunger, a mandrel disposed above the bedplate and having an operative end equipped within the mold cavity with a thread and a rounded tip beyond said thread, said mandrel having a shaft equipped with a thread of corresponding pitch engaging a threaded stationary bearing carried by said bed-plate, means for rotating said mandrel and effecting withdrawal of the mandrel to cause the tip-portion to clear the mouth of. the container, and bodily shiftable pressure mechanism disposed above the mold and equipped with a plunger adapted to force a charge from the charge-receiving cavity into the mold-cavity.

l2. In a machine of the character set forth, the combination of a mandrel having a threaded operative end extending into the mold-cavity and a rounded tip-portion beyond the threaded portion, said mandrel having a shaft equipped with a thread, a pair of bearings for said mandrel, one of said bearings being longitudinally threaded and disengageably engaged by the thread of the shaft, means for rotating said mandrel, and stop means for limiting the rotation of the mandrel when the thread on its shaft becomes disengaged from the internallythreaded bearing, said stop means permitting the mandrel to slide longitudinally after it becomes disengaged from said threaded bearing to cause the tip-portion of the mandrel to clear the mouth of the container.

13. In a machine of the character set forth, the combination of a base, a halfmold section mounted on said base, a pair of quarter-mold sections surmounting said half-mold section and adapted to swing about horizontal pivots, said quarter-mold sections being'equipped with upward extensions affording a charge-receiving cavity, a

`plunger adapted to force the charge from the charge-receiving cavity into the moldeavity, a mandrel having an operative end within the mold provided with a rounded.

tip and an external thread at the base of said tip Said mandrel having a 'shaft equipped with a thread of the same pitch, a bearing for the mandrel provided with a thread engaging the thread of said shaft, a hand-wheel connected with the rear end of said shaft,

and stop means for limiting the rotation of the mandrel in the unscrewing operatlon, said stop means permitting longitudinal shifting of the mandrel after the thread on its shaft has become disengaged from the threaded bearing, thus enabling the mandrel to slide longitudinally until its tip-portion clears the mouth of the container.

14. In a machine of the character set forth, the combination of a bed-plate, a lower mold-section ixedly mounted thereon and a pair of complemental upper mold-sections provided with complemental upward extensions affording a charge-receiving cavity, said upper sections being pivotally mounted to permit them to be swung to open position, a mandrel disposed above the bedplate and having an operative end equlpped within the mold-cavity with a thread, sald mandrel having a shaft equipped with a thread of corresponding pitch enga-ging a threaded stationary bearing carried by said bed-plate, means for rotating said mandrel to effect withdrawal thereof, bodily shiftable pressure mechanism disposed above the mold and equipped with a plunger adapted to force a charge from the chargereceiving cavity into the mold-cavity, and mold-locking means shiftable with said pressure mechanism and adapted to maintain the mold in locked condition while the pressure mechanism is in a retracted position, permittin introduction of metal into the mold.

15. n a machine for the purpose set forth, the combination of a mold comprising longitudinally separable sections adapted to receive between them the neck of a container, said mold being provided at one side of the `mold-cavity with a charge-receiving cavity, a withdrawable mandrel having an operative end extending into the mold-cavity, shiftably mounted pressure mechanism provided with a plunger adapted to force the molten metal from the charge-receiving cavityT into the mold-cavity, and mold-locking means shiftable with said pressure mechanism and adapted to maintain the mold in locked position when said pressure mechanism is in the operative position and also when said pressure mechanism is in a retracted position, permitting introduction of metal into the charge-receiving cavity of the mold.

16. In a machine for the purpose set forth, the combination of a mold comprising longitudinally separable sections adapted to receive between them the neck of a container, said mold being provided at the upper` side of the mold-cavity with a chargereceiving cavity, a withdrawable mandrel having an -operative end disposed in the mold-cavity and adapted to form a thread in the container in the molding operation, a forwardly and rearwardly shiftable carriage equipped with pressure. mechanism adapted to force the metal from the chargereceiving cavity. into the mold-cavity, and elongated cams carried by said carriage and adapted to maintain the mold in locked condition when the pressure mechanism is in the operative and also when it is in a retracted position, permitting introduction of a charge of metal into the charge-receiving cavity.

17. In a machine for the purpose set forth, the combination of a mold comprising al lower half section and a pair of complemental upper quarter sections which are pivotally mounted and provided with upward extensions, affording a charge-receiving cavity, a mandrel adapted to form an internal thread in the mouth of the container, said mandrel having an operative portion equipped with an external thread located in the mold-cavity and having a shaft equipped with a thread of corresponding pitch engaging a threaded stationary bearing, means for rotating said mandrel, guides extendin parallel with said mandrel, a forwardly ang rearwardly shiftable carriage mounted on said guides and equipped with pressure mechanism adapted to force the metal from the charge-receivimg` cavity into the moldcavity, and elongated mold-Lookin cams carried by said carriage and adapte to embrace the upward extensions of said upper mold-sections when the pressure mechanism is in the operative position and also when the pressure mechanism, is in a partially retracted position, permitting introduction of the metal into the charge-receiving cavity while the mold is in locked condition.

18. In a machine for the purpose set forth, the'combination of a mold comprising longitudinally separable sections adapted to receive between them the neck of a container, said mold being provided at the upper side of the mold cavity with a char erreceiving cavity, a mandrel adapted to orm an internal thread in the mouth of the container said mandrel having a tip-portion adapted to extend into the neck of the container and having at its base-portion thread-forming means, means for projecting and retracting the mandrel, guides extendlng substantially parallel with the mandrel, a forwardly and rearwardly shiftable carriage mounted on said guides and equipped above the plane of the mandrel with' a pressure cylinder, a piston working in said cylinder and equipped with a plunger adapted to force the metal from the charge-receiving cavit into the mold cavity, and means for shifting said carria e.

19. n a machine for the the combination of a mo d comprising a urpose set forth,

lower half section and a pair of complemental upper quarter sections which are pivotally mounted and provided With upper extensions, affording a charge-receiving cavity, a mandrel adapted to form an internal thread in the mouth of the container, said mandrel having an operative portion provided externally With threadforming means, means for projecting and retracting the mandrel, guides extending arallel With said mandrel, a forwardly and) rearwardly shiftable carriage mounted on said guides and equipped With pressure mechanism adapted to force the metal from the chargereceiving cavity into the mo1d-cavity, and elongated mold-locking cams carried by said carriage and adapted to embrace the up- Ward .extensions of said upper Inold-sec tions when the ressure mechanism is in the operative position and also When the pressure mechanism is in a partially retracted position, permitting introduction of the metal into the charge-receiving cavity while the mold is in locked condition.

HARRY M. BROWN. 

